Non-skid tire-grip.



H. D. iw'REENE.

NON-SKIDTIRE GRIP.

APPLICATION FILED MAYG. l9l6.

LE4L621. Patented Oct. 2, 1917.

1 nAnonn n ennnnn; oF' BRITT; Iowa. 7

i Ti; all wlwm itfctjy't'cemi Be i-rkaewnatae-I; I-IniioLDD. GREENE, a

; citizen of the United States; resiain at Britt, in the county of Hancock and tate of Iowa, have invented eertam new and useful Imprpvements in jNon-Skid Tlre- Grips; and'I dc'liereby declare t'li'eifollow ing to be a full, clear, and exact'descripti'ofi of the invention, such as will enable others skilled in the art to which it appertains to make andjuse the same. p

"My present invention has for its object to providean extremely simple and highly efficient non-skid grip or tread applicable to pneumatic and other forms of tires, and x a 1 especially servlceable on. automobiles, and

l 7 auto trucks. The invention is in the nature of an improvement on, or modification of v date March 1, 1916, and the particular obthe tire grip" disclosed and claimed in my pending application, S. N. 81,364, filed of i --ject of the invention-is to increase the flexibility of tire grips of the'jcharacter dis- V ,closed and broadly claimed in my said prior application.

In the accompanying drawings which illustrate the invention, like characters inj 1 dicate like parts throughout the-several P views.

Referring to the drawingsf Figure 1 is a side elevatlon showing the rim( of a vehicle wheel equipped with. apneumatic tire, having my improved tire grip applied thereto; 7 I

Fig. 2 is a plan view of the parts shown in Fig. 1;. and i Fig; 3 is an enlarged transverse section taken on the line 00 m of Fig- 1- tire of an automobile wheel.

The numerals 1,2, and 3 indicate respectively the felly, the rim, and the pneumatic The non-skid tire grip, so-called, is preferably made up of a multiplicity of clrcumffferentially spaced tread sections that areindependently securable tothe wheel. Each suchsection comprises a centrally located circumferentially extended jointed tread bar made up of tread blocks 4 and connecting T fi-links5 pivotally connected thereto. Tothe said tread blocks 4:, curved transversely exften'ded tread bars 6 are pivotally connected I at their radially outer ends. The radlally 1n- I nor ends ofthe' transverse tread bars 6 and 5, j at each side of the tire are tied together by i o o shown as provided with flexib e 1ntermed1- spacingjrods .7. Said spacin rods 7 are specificationof Letters Patent.

aperitaa'en'fiwd new, 1916, Serial No, 95,789.

seam time-ems.

Patented 0a.- aim;

- ate'joirits" at 's, "and fat jtheir' ends they? at connected at the ends or the "anchor rods '9.

Theypassed through perforations inr theouter' ends ofthe' end of the tread blocks '4 of theiread "section. "By rfre'ans of buckle straps 10 passed through the loops oif the anchor'rods 9 and between the spores of the wheel, the tread sections may be anchored to the wheel, and held against circumferential creeping movements thereon.

Said spacing rods 7 are provided with stops or spacing devices for spacing theengaged ends of the transverse tread bars 6 and these are shown formed by coiled wire spacing sleeves 7 passed around said rods between the said tread bars. Obviously other forms of stops or spacing devices might be provided. The said spacing rods have sufiicient flexibility to permit independent pivotalmovements of the tread bars 6 under the movement of the wheel and the action of the load on the tire.

Tread sections constructed in this manner will have both transverse and circumferential flexibility so that they will yield and adapt themselves to the tire and hence,

neither destroy the elasticity of the tire nor.

produce intense strains on the elements of the non-skid tire grip. .Furthermore, they.

leave very considerable portions of the tire exposed for engagement with the ground when running on soft roads' To decrease the wear between the tire and the jointed sections of the tire grip, a flexibly turned sheet metal saddle plate is interposed between the said tire and tread members. This saddle plate 11 as shown comprises a circumferential strap located under the tread links 5 and blocks 4 and provided with curved laterally extended flexible arms 12 located under the transverse tread bars 6. Preferably the said saddle plate would be riveted or otherwise secured to'the tread blocks 4. However, this socalled saddle plate is not an absolutely essential feature.

What I claim is:

1. A non-skid tire grip made up of a centrally located jointed circumferentially extended tread bar and curved laterally extended tread bars pivoted thereto, flexible spacing devices connecting the ends of said transverse tread bars, and means for securing said tire grip to a wheel rim and tire 3.

2. A non-skid tire grip made up of a centrally located jointed cireumferentially extended tread bar and curved laterally errtended tread bars pivoted thereto, and a flexible saddle plate comprisinga central cir-'-' cuinferential strip and laterally projecting strips, the former being located under the circumferentially connected tread members,

and the latter being located under said tran verse tread bars.

3. A non-skid tire grip made up of a multiplioity of flat tread blocks with l0ngitudinallyr and laterally projecting pivot lugs, relatively narrow circumferentially extended tread links pivotally connected at their ends to the longitudinal lil'gs of said tread blocks, curved circumferentially spaced transversely extended tread bars pivotally connected to the transverse pivot lugs of said tread blocks, and spacing devices flexiblyconnecting the extended ends of said tread bars, and said tread links and tread v PL HEA Y,

- M. MOLLOY.

(topics of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D; Eff 

